Jevonte is making lemonade from concentrate. The relationship between the number of quarts of concentrate, x, and the number of quarts of water, y, is represented by the graph below.

Question

Jevonte is making lemonade from concentrate. The relationship between the number of quarts of concentrate, x, and the number of quarts of water, y, is represented by the graph below.

What is the constant of proportionality as shown in the graph?
Amount of Water (in quarts)
y axis (numbers)
30
27
24
21
18
15
12
9
6
3
(0,0)
Amount of Concentrate (in quarts)
x axis (numbers)
3, 6, 9, 12, 15, 18, 21, 24, 27, 30

Answer 1

The constant of proportionality is the value that relates the number of quarts of concentrate to the number of quarts of water. From the graph, we can see that as the number of quarts of concentrate doubles, the number of quarts of water also doubles. Therefore, the constant of proportionality is 2.